Low-attenuation, high-power and high-temperature coaxial radio frequency cable and production technology

Abstract

The invention discloses a low-attenuation, high-power and high-temperature coaxial radio frequency cable and a production technology. The low-attenuation, high-power and high-temperature coaxial radio frequency cable comprises an inner conductor layer, an insulating layer, a shielding layer and a sheath layer, wherein the insulating layer is arranged outside the inner conductor layer; the shielding layer is arranged outside the insulating layer; the sheath layer is arranged outside the shielding layer; a silver-coated copper wire is adopted by the inner conductor layer; low-density polytetrafluoroethylene is adopted by the insulating layer; a corrugated copper pipe is adopted by the shielding layer; and fluorinated ethylene propylene is adopted by the sheath layer. With the polytetrafluoroethylene with a relatively good temperature-resistant grade as an insulating material, the temperature resistance of the material can reach 275 DEG C. In order to ensure that the cable has a relatively low attenuation value, the low-density polytetrafluoroethylene is specially adopted; and the dielectric coefficient can reach about 1.5, and is equivalent to that of common foamed polyethylene, but the service power can be improved by 40%.

Description

technical field [0001] The invention relates to a low-attenuation, high-power, high-temperature coaxial radio frequency cable and a preparation process thereof, which are widely used in signal transmission connection feeders in the 10MHz-18GHz frequency band, especially in occasions requiring small attenuation and high power for indoor coverage. Background technique [0002] At present, the conductors of similar products produced in China mostly use a single copper wire or copper-clad aluminum wire, and the insulating layer uses foamed polyethylene, which has achieved the purpose of reducing attenuation. However, the temperature resistance of the foamed polyethylene insulation layer is only 75°C, which makes its use power very small; if the power is high, the cable will heat up, and when the temperature exceeds its use temperature, the cable insulation layer loses the meaning of insulation. Contents of the invention [0003] Purpose of the invention: The purpose of the inv...

AI Technical Summary

Problems solved by technology

However, the temperature resistance of the foamed polyethylene insulation layer is only 75°C, which makes its use power very small; if the power is large, the cable will heat up, and when the temperature exceeds its use temperature, the cable insulation layer loses its insulation meaning

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